DataPrep.Connector: Location is required when latitude and longitude are provided (Yelp)

[jnwang]

Describe the bug DataPrep.Connector always requires location to be specified. However, according to the Yelp API documentation, location is not required when latitude and longitude are provided. It would be better to make it consistent with the doc.

from dataprep.connector import Connector

conn_yelp = Connector("yelp", _auth={"access_token":yelp_access_token}, _concurrency = 5)

df = await conn_yelp.query("businesses", term = "resturant", latitude = "49.28617652439037", longitude = "-123.13819352127699", _count = 10)

Desktop (please complete the following information):

OS: MacOS Catalina Browser: Chrome Platform: Jupyter Notebook Platform Version 6.0.1 Python Version 3.7.4 Dataprep Version 0.2.4

[dovahcrow]

Certainly, we can relax the requirement of location to optional, but that's not correct. Eventually, we want to have some enforcement of: either param A or param B exist.